Homework: Correlational Analysis
Description: A school educator is interested in determining the potential relationship between grade point average (GPA) and IQ scores among ninth graders. The educator takes a random sample of 30 ninth graders aged 14 years old and administers the Wechsler Intelligence Scale for Children-Fourth Edition (WISC-IV). The WISC-IV includes a Full Scale IQ (FSIQ; however, for this homework we will just call it IQ).
Answer the following Questions:
I. Hypotheses - Formulate null and alternative hypotheses. What do you think is the relationship between IQ scores and GPA?
II. Variables - Describe the scale of measurement (nominal, ordinal, interval, or ratio) for each of the variables.
III. Correlation - Write an overview of the results of the correlation (at least two paragraphs), including the appropriate and necessary statistical results within sentences and in proper APA formatting. Be sure to provide sufficient explanation for any numbers presented. Consider the following in your overview and conclusions:
i. Is there a significant correlation between IQ scores and GPA? If so, what does a significant correlation mean?
ii. Using the correlation table and scatterplot, explain whether the relationship is positive, negative, or no correlation.
iii. Describe the strength of the relationship (e.g. very strong, moderate, weak, etc.).
iv. What do the results tell us about your hypotheses?
v. What conclusions can we draw from these results? What conclusions can we NOT make using these results?
Textbook: Malec, T. & Newman, M. (2013). Research methods: Building a knowledge base. San Diego, CA: Bridgepoint Education, Inc. ISBN-13: 9781621785743, ISBN-10: 1621785742. Chapter 4: Survey Research-Describing and Predicting Behavior.
Format your homework according to the following formatting requirements:
i) The answer should be typed, using Times New Roman font (size 12), double spaced, with one-inch margins on all sides.
ii) The response also includes a cover page containing the title of the homework, the student's name, the course title, and the date. The cover page is not included in the required page length.
iii) Also include a reference page. The Citations and references must follow APA format. The reference page is not included in the required page length.